1 2 3 6 12 ( )A．20 B．24 C．18 D．36

熱心網(wǎng)友

1 2 3 6 12 ( )A．20 B．24 C．18 D．36 1+2=31+2+3=61+2+3+6=121+2+3+6+12=24 ,選　B

熱心網(wǎng)友

D.36

熱心網(wǎng)友

B